Insulated box



March 25, 1952 J. RUTHVEN, JR., x-:TAL v 2,590,724

IVNSULATED BOX March 25, 1952 J.'RU1IHVEN,JR., ETAL.. 2,590,724

INSULATES BOX Filed oct. 11. 1949 5 Sheets-Sheet 3 Marc'h 25, A1952 J. RUTHVEN, J., l-:rAL 1 2,590,724

` INSULATED Box Filed oct. 11, 1949 5 sheets-sheet4 March 25, 1952 J. RUTHVEN, JR., Erm. 2,590,724-

INSULATED Box Patented Mar. 25, 1952 UNITED STATES PATEN T OFFICE:

INsULATED 30x James Ruthven, Jr., Rocklaid, and Robert G.

Harrison, North Qulcy, Application` October 11, 1949,` Seral No. 120,73 3 Claims. (C1. 2287-16) may be used to keep bottles or cans of cool or for other purposes.

It is an object of our invention to provide a double-walled insul beverages case may be Further o interior const Figure 61s a plan view of the blank from which the box is formed;

Figure? is a plan view of a blank forming part of thecover;

Figure a' is a plan view of the bl part of the cover; and Figure 9 is a fragmentary vertical section taken on the plane indicated 9 9 in Figure 5.

The blank from which the carton is formed ishown in Figure 6, in which the panels II) and I2 are the outer side walls. The panels I4 and I6 are the outer end walls. The naps I1, I8, 20 and tend from the panels I0, I2, I4 and I 6, ttom Wall of the ank and another ass.

. 2 Between the panels I0 and 24 there is provided a connecting strip 40 which se Vves as aspacer betwlen the inner and outer wal s of the carton. This tpace as hereinafter explained is filled with insuliting material. Similar connecting strips 42, 4t and 46 are provided between the panels I2 and E6; the panels I4 and 23; and the panels I6 and m, respectively.

The` nap 48 extendin uitably fastened to the panel The panel 26 has a ened to the panel 30 have corresponding ich is s 28, as shown in Figure 3. similar tiap 52 which is fast and the panels 28 and 30 flaps 54 and 5%.

The connecting strips 40, 42, 44 and 46 are' shaped to meet at their ends, as shown in Figure 5, and are provided with the tabs 53 which are turned downwards, as shown in Figures 2 and 9, and are suitably fastened together. These tabs serve to strengthen the corners of the carton.

The flaps from the inner side walls may be The joint between the panel I I at one vertical corner edge of the box, is covered by a reenforcing strip 14. The compartment 16 within the carton forms the storage space.

A suitable insulated cover is a carton.

0 and the panel reenforced by "AQofH-an router wall, wh

filled with insulation 94, then a reenforcing sheet of, plywood or stiff breboard 96 is inserted to which the flaps 188 and 92 are secured, such as by staples 98. The inner part of the cover is then assembled with the outer part 88 and these parts are suitabl glued together.

The blank shown in Figure 6 is folded to forroY the box. It will be noted that one edge of each inside wall is extended to contact the inside fare ie`thelother edge of each in Figure 7, is suitably formed to shape:

inside wallrisioldeghwhereby the edge .contacts the inner face of an V`V`djacen wall of the bsx. As shown in Figure 3, the panel 24 extends v0 form a brace against the outer wall I6, while tie flap 50 of the panel 24 is turned at right anges and forms a brace for the outer wall It). 'Ine folded flap 50 is suitably fastened to the extension of the panel 28. The fastening may beghe staples 60 as shown. The triangular tabs .38` are turned down into the space between the inner and outer wallf'and. fastened such as by staples t2, as shown inlguietical flap overlapping an extension terior of the box outer Wall at a right angle to 9. The space betweenthe'inner and outer walls is filled With suitable insulation mater1al.,k'lhe bottom of the box is thenr-reenfcrced by the sheet 64 of plywoodor stiff fibreboard and the flaps which are turned in from the inner and lluter walls are. suitably fastened to the plywood such as Vby the staples 66.

The space between the fiapson the inner and outer surface at the bottoni are filled withpieces of corrugatedboard or other suitable naterial cut to fill the spaces. The bottom of tie box,

both inside and out, may then be coveredto form I a smooth surface. adhesively applied and the also be applied to the edge, to of one corner of the box where the joint'is made 'and is shown by the tape. 'ill in Figures 1 and 3. It is also desirable to cover the entire box with a suitable waterproof-abrasive-resisting coating 100 for example we may use Geon latex. This coating will prevent water or other liquids from causing deterioration of the corrugated board.

The cover is formed fromthe two blanks shown in Figures 7 and 8the'cover-being reenforced We may use. tape naterial adhesive tape may the vertisal edge by sheets of plywood or other suitable material and ther space within the'lcover is filled with insulated material. If the boxis to be carried', at sultablehandle can be fi'xedtothe box. The specific handle construction hasv not. beenv disclosed.: Y

We claim:

l. In a double-walled insulated, box, a single blank of corrugated board folded to form the box. the outer walls. being' joined.A byV folded' vertical edges except at one vertical edge, the pair of outer. walls which-meet at saidY last named vertical edge being joinedY together by a ap of one of said walls, a reinforcement secured to the exterior of the box to seal` the joint between said pair of walls, each of the inner vertical walls being connected to an outer wall by a nap which forms. a top closure for. the space between said walls, each of said inner wallshaving anextenvtical ap overlapping an extension 'jacent inner wall and means for securing together sion abutting at a free vertical edge against an outer wall at a right angle to the inner wall and each of said inner walls having a vertical nap abutting at its free vertical edge against an outer wall which is parallel to the inner wall, said verfrom an adjacent inner wall and means for securing together said inner Wall flaps and inner wall extensions.

2. In a double-walled insulated blank of corrugated board folded to form the box, the outer walls being joined by folded vertical edges except at one vertical edge, the pair of outer walls which meet at said last named-ver tical edge being joined together by a flap of one of said walls, a reinforcement secured to the exto seal the joint between said pair of walls, eachof the inner vertical walls being connected to an outer Wall by a flap which forms atop closure for the space betwee walls, each of said inner walls h an extension abutting at a freefiertie edge against an the inner wall and each of said inner walls having a vertical flap abutting at its free vertical edge against an outer wall which is parallel to the inner wall, said verfrom an adsaid inner wall flaps and inner wall extensions, said inner and outer walls having bottom flaps folded inwardly in parallel planes, a reinforcing member for the entire area of the bottom of the box and means for securing said flaps to said reinforcement.

3. In a double-walled insulated box, a single blank of corrugated board folded to form-,the box,

` said blank having four panels joined to each other parallel cuter to forni the outer walls of the box, four flaps joined to each other and to the outer wall panels. to forni a top closure between the inner and outer walls of the box, four panels each of which is connected to one of said aps, each of. said last named panels forming. the inner wallof thebox. and. having a vertical nap folded at right angles from the inner wallv portion. to abut againsta wall and each, of saidinner. wa panelshaving an extension. from the innerA wall portion in the plane thereof and abutting against an outer wall at right angles to the inner. wall portion.

JAMES RUTHVEN; JR.

ROBERT G. HARRISON.

EEIFEIREZTJCESv CITED The following references are of record ln the file of this patent:

UNITED STATES PATENTS 

